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EP1508425A2 - Method and apparatus for producing plastic pipes - Google Patents

Method and apparatus for producing plastic pipes Download PDF

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Publication number
EP1508425A2
EP1508425A2 EP04013077A EP04013077A EP1508425A2 EP 1508425 A2 EP1508425 A2 EP 1508425A2 EP 04013077 A EP04013077 A EP 04013077A EP 04013077 A EP04013077 A EP 04013077A EP 1508425 A2 EP1508425 A2 EP 1508425A2
Authority
EP
European Patent Office
Prior art keywords
calibration
pipe
chamber
calibration chamber
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04013077A
Other languages
German (de)
French (fr)
Other versions
EP1508425B1 (en
EP1508425A3 (en
Inventor
Herbert Ulrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Egeplast Werner Strumann GmbH and Co KG
Original Assignee
Egeplast Werner Strumann GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Egeplast Werner Strumann GmbH and Co KG filed Critical Egeplast Werner Strumann GmbH and Co KG
Publication of EP1508425A2 publication Critical patent/EP1508425A2/en
Publication of EP1508425A3 publication Critical patent/EP1508425A3/en
Application granted granted Critical
Publication of EP1508425B1 publication Critical patent/EP1508425B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/256—Exchangeable extruder parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/266—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
    • B29C48/2665—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated allowing small relative movement, e.g. adjustments for aligning the apparatus parts or for compensating for thermal expansion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/905—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using wet calibration, i.e. in a quenching tank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/916—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material

Definitions

  • the invention relates to a process for the preparation of Plastic pipes according to the preamble of the main claim and to an apparatus for producing plastic pipes according to the preamble of claim 4.
  • nozzle and mandrel of the pipe head are conical.
  • Both the wall thickness and the diameter of the Extruded tube can be adjusted exactly.
  • the invention is based on the object, the quite expensive designed calibration basket according to EP 1 115 550 B1 in the Simplify calibration chamber.
  • the extrusion line is operated at creeping speed and that during operation the extrusion line without interruption and transection of the extruded tube, a change of the calibration in the calibration chamber can take place.
  • an adjustable tube head 1 can be seen, in the production direction seen in a not shown in the drawing Extruder connects.
  • a vacuum suction cup 2 which with a Vacuum connection 5 is equipped in the measuring devices are provided, which depend on the desired tube outer diameter, the ruling in the suction cup Adjust vacuum so that thereby the tubular melt stream adjusted to the desired outer diameter, d. H. is sucked, wherein in the vacuum suction cup 2 already a pre-cooling of the melt strand can be done.
  • the Vacuum Suction Cup 2 can be used in conjunction with the adjustable Tube head can be set to an exact tube wall thickness, wherein the pipe wall thickness in dependence of the outer diameter of the pipe can be varied.
  • the vacuum suction cup 2 is followed by a calibration chamber 3 on.
  • a calibration chamber 3 On.
  • an accurate calibration of the outside diameter takes place the melt strand and already partially cured Tube.
  • Vacuum Calibration 4 is then the cooling and curing the plastic pipe by spraying water, wherein in the drawing, a water inlet 6 and a water drain 7 is recognizable. Furthermore, close to the vacuum calibration 4 to a vacuum port 8 and located in the Vacuum calibration 4 located pipe 10 passes over support rollers 11, which can also be referred to as Kalibrierrollen and can be adjusted to the desired pipe diameter.
  • support rollers 11 which can also be referred to as Kalibrierrollen and can be adjusted to the desired pipe diameter.
  • the surface of the tube 10 is relatively hard and the tube 10th leaves the vacuum calibration 4 by a vacuum seal 9, either independently on the pipe diameter or depending on the set pipe dimensions is set.
  • a vacuum seal 9 can form rollers be arranged hydraulically or by mechanical springs be pressed while being here in the run of the pipe water for lubrication and sealing introduced can be.
  • Fig. 1 is further seen that the actual vacuum calibration 4 together with the calibration chamber 3, for example on a track 12 over stands equipped with wheels 14 can be moved so that a separation of Extrusion line in the area between the calibration chamber 3 and the vacuum chamber 2 can be done.
  • a lifting system 15 is also movable on roll supports 16th provided and may be laterally or above the extrusion line be set.
  • This lifting system 15 has, for example Carrier 17, to which a connecting piece 18 connects, the equipped with a gripping arm 19, which is for replacement the replaceable Kalibrierhülsen is provided.
  • the arrow F 1 illustrates in Fig. 1 the possible stroke movement of the carrier 17th
  • Fig. 2 is an embodiment of a possible gripping device shown.
  • the carrier 17 is recognizable together with the fitting 18 and the gripping arm 19.
  • Der Gripper arm 19 carries at its free end gripper neck 23 and 24, which are adjustable about a joint 27.
  • a Kalibrierhülse 20 has a hinge 21, which is provided opposite a closing mechanism 22, so that this calibration sleeve 20 can be opened and thus can be placed over the pipe to then, after it encloses the pipe to be inserted into the calibration chamber 3 ,
  • the gripper sleeves 23 and 24 engage in receptacles 25 and 26 of the calibration sleeve 20, open the calibration sleeve 20 - pivoting movement according to arrow F 5 - to the joint 21, ie pivot the two parts of the calibration 20 about the joint 21 after the locking mechanism opens accordingly is and after the calibration sleeve is placed around the pipe, the gripping sleeves 23 and 24 close the calibration sleeve 20 again and the locking mechanism 22 locks the calibration sleeve 20 in its working position.
  • the calibration sleeve as in the prior art for example from WO 96/36475, d. H. there are slight adjustments of the calibration sleeve forming individual segments possible, so that a smooth inner pipe surface in the Calibration sleeve is created and the inner radius of this Pipe inner surface of the calibration sleeve 20 may be minor Wall thicknesses can be adjustable.
  • Fig. 2 illustrates the arrow F 1, the possible stroke movement of the actual carrier 17, the arrow F 2, the movement of the connecting piece 18 on the carrier 17, the arrow F 3, the possible pivotal movement of the gripping arm 19 about its longitudinal axis, the arrow F 4 the possible pivotal movement of the connecting piece 18 to the support 17 so that all positions are reachable to remove the located in the calibration 3 calibration sleeve 20 from the calibration chamber 3, store this sleeve in a storage warehouse, there to take a new calibration 20 and these in turn set via the tube 10 to introduce into the calibration chamber 3.
  • the system described as an example of course can also be used when a separation of the actual Pipe in the area between the vacuum chamber 2 and the Calibration 3 should be done.
  • the extrusion line must of course be shut down while in the above-described embodiment in which the calibration sleeve is inserted around the tube 10, the extrusion line will be continued at creep speed can. Additional cooling equipment may be required here, the exposed pipe in the area between the Vacuum chamber 2 and the calibration chamber 3 cool and thus prevent too much sagging of the pipe.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A vacuum suction chamber(2) for controlling pipe diameter is followed by a calibration chamber(3). Selected calibrating sleeves(20) can be inserted into the calibration chamber to surround the extruded pipe(10) when the extrusion line is operating at slow speed. An independent claim is included for the process plant which has a movable calibrating chamber(3) and vacuum calibration bath(4) to allow access for inserting or removal of calibration sleeves(2).

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Kunststoffrohren gemäß dem Oberbegriff des Hauptanspruches und auf eine Vorrichtung zur Herstellung von Kunststoffrohren gemäß dem Oberbegriff des Anspruches 4.The invention relates to a process for the preparation of Plastic pipes according to the preamble of the main claim and to an apparatus for producing plastic pipes according to the preamble of claim 4.

Aus der EP 1 115 550 B1 ist eine Anordnung, d. h. eine Vorrichtung und ein Verfahren zur Herstellung von Kunststoffrohren bekanntgeworden, das ein Extrusionssystem aufweist, bei dem im laufenden Betrieb der Rohrdurchmesser verändert werden kann. Durch den Einsatz dieser Extrusionslinie wird die Produktivität erhöht, der Personalaufwand reduziert und Produktionsabfälle reduziert, wobei weiterhin kurze Lieferzeiten ohne aufwendige Lagerhaltung erreichbar sind.From EP 1 115 550 B1 an arrangement, i. H. a device and a method for the production of plastic pipes has become known which has an extrusion system in which ongoing operation of the pipe diameter can be changed. The use of this extrusion line increases productivity increased, personnel expenses reduced and production waste reduced, whereby continued short delivery times without consuming Storage are available.

Hierbei sind Düse und Dorn des Rohrkopfes konisch ausgebildet. Durch die Veränderung der axialen Position des Dornes können sowohl die Wanddicke als auch der Durchmesser des extrudierten Rohres exakt eingestellt werden. Here, nozzle and mandrel of the pipe head are conical. By changing the axial position of the mandrel Both the wall thickness and the diameter of the Extruded tube can be adjusted exactly.

In einer sich an den Rohrkopf anschließende Vakuum-Saugglocke, in der Meßvorrichtungen vorgesehen sind, die in Abhängigkeit des gewünschten Rohraußendurchmessers das in der Saugglocke herrschende Vakuum einstellen, wird der rohrförmige Schmelzestrang auf den gewünschten Außendurchmesser eingestellt, d. h. aufgesaugt. Hieran schließt sich eine Kalibrierkammer an, in der das genaue Kalibrieren des Außendurchmessers des Schmelzestranges und des schon teilweise ausgehärteten Rohres erfolgt. Das so genau kalibrierte Rohr wird in ein Vakuum-Kalibrierbad geführt, das mit einer sich anpassenden Endabdichtung ausgerüstet ist.In a subsequent to the pipe head vacuum suction cup, are provided in the measuring devices, in Dependence of the desired pipe outside diameter in set the suction cup prevailing vacuum, the tubular Melt strand to the desired outer diameter set, d. H. absorbed. This is followed by a Calibration chamber, in the accurate calibration of the outer diameter of the melt strand and already partially hardened pipe takes place. The accurately calibrated tube is fed into a vacuum calibration bath that has an adaptive Endabdichtung is equipped.

Aus dem DE 298 22 651 U1 ist eine Kühl- und Kalibriervorrichtung für extrudierte Kunststoffprofile bekanntgeworden, vorzugsweise Fensterprofile, bei der im Bodenbereich eines Kalibriertankes eine oder mehrere Zentrierwellen vorgesehen sind. Hierdurch ist es möglich, nach Herausziehen der Zentrierwelle die Kalibrierwerkzeuge in einfachster Weise auszuwechseln. Eine Auswechselung während der Produktionsphase erfolgt hierbei nicht.From DE 298 22 651 U1 is a cooling and calibration device have become known for extruded plastic profiles, preferably Window profiles, at the bottom of a calibration tank one or more centering shafts are provided. This makes it possible, after pulling out the centering shaft replace the calibration tools in the simplest way. A replacement during the production phase takes place not here.

Auch ist es aus der DE 40 33 441 C2 bekanntgeworden, Kalibrier- und Kühlvorrichtungen für extrudierte Rohre aus Kunststoff klappbar auszubilden, aber auch hier erfolgt keine Auswechselung der Kalibrierhülse während der Produktionsphase des Rohres.It has also become known from DE 40 33 441 C2, Calibration and cooling devices for extruded tubes made Plastic folding form, but also here is no Replacement of the calibration sleeve during the production phase of the pipe.

Der Erfindung liegt die Aufgabe zugrunde, den recht aufwendig gestalteten Kalibrierkorb gemäß der EP 1 115 550 B1 in der Kalibrierkammer zu vereinfachen.The invention is based on the object, the quite expensive designed calibration basket according to EP 1 115 550 B1 in the Simplify calibration chamber.

Gemäß der Erfindung wird vorgeschlagen, daß die Extrusionslinie im Schleichgang betrieben wird und daß während des Betriebes der Extrusionslinie ohne Unterbrechung und Durchtrennung des extrudierten Rohres ein Wechseln der Kalibrierhülse in der Kalibrierkammer erfolgen kann. Hierbei umgreift die Kalibrierhülse das Rohr und hierzu werden geteilte Kalibrierhülsen eingesetzt.According to the invention, it is proposed that the extrusion line is operated at creeping speed and that during operation the extrusion line without interruption and transection of the extruded tube, a change of the calibration in the calibration chamber can take place. This encompasses the calibration sleeve the pipe and this will be split calibration sleeves used.

Eine Vorrichtung zur Durchführung dieses Verfahrens wird in den Ansprüchen 2 bis 10 erläutert.An apparatus for carrying out this method is described in to claims 2 to 10 explained.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen erläutert. Die Zeichnungen zeigen dabei in

Fig. 1
eine Extrusionsanlage gemäß der Erfindung, in
Fig. 2
in größerem Maßstab die eigentliche Greifeinrichtung für die auszuwechselnde Kalibrierhülse und in
Fig. 3
den Betriebszustand während des Auswechselns , der Kalibrierhülse.
An embodiment of the invention will be explained below with reference to the drawings. The drawings show in
Fig. 1
an extrusion plant according to the invention, in
Fig. 2
on a larger scale, the actual gripping device for the calibration sleeve to be replaced and in
Fig. 3
the operating state during replacement, the calibration sleeve.

In Fig. 1 ist ein verstellbarer Rohrkopf 1 erkennbar, der in Produktionsrichtung gesehen an einen in der Zeichnung nicht dargestellten Extruder anschließt. An den verstellbaren Rohrkopf 1 schließt sich eine Vakuum-Saugglocke 2 an, die mit einem Vakuumanschluß 5 ausgerüstet ist, in der Meßvorrichtungen vorgesehen sind, die in Abhängigkeit des gewünschten Rohraußendurchmessers, das in der Saugglocke herrschende Vakuum einstellen, so daß dadurch der rohrförmige Schmelzestrom auf den gewünschten Außendurchmesser eingestellt wird, d. h. aufgesaugt wird, wobei in der Vakuum-Saugglocke 2 bereits eine Vorkühlung des Schmelzestranges erfolgen kann. In der Vakuum-Saugglocke 2 kann in Verbindung mit dem verstellbaren Rohrkopf eine genaue Rohrwanddicke eingestellt werden, wobei die Rohrwanddicke in Abhängigkeit des Außendurchmessers des Rohres variiert werden kann.In Fig. 1, an adjustable tube head 1 can be seen, in the production direction seen in a not shown in the drawing Extruder connects. To the adjustable tube head 1 joins a vacuum suction cup 2, which with a Vacuum connection 5 is equipped in the measuring devices are provided, which depend on the desired tube outer diameter, the ruling in the suction cup Adjust vacuum so that thereby the tubular melt stream adjusted to the desired outer diameter, d. H. is sucked, wherein in the vacuum suction cup 2 already a pre-cooling of the melt strand can be done. In The Vacuum Suction Cup 2 can be used in conjunction with the adjustable Tube head can be set to an exact tube wall thickness, wherein the pipe wall thickness in dependence of the outer diameter of the pipe can be varied.

An die Vakuum-Saugglocke 2 schließt sich eine Kalibrierkammer 3 an. Hier erfolgt ein genaues Kalibrieren des Außendurchmessers des Schmelzestranges und des schon teilweise ausgehärteten Rohres. The vacuum suction cup 2 is followed by a calibration chamber 3 on. Here an accurate calibration of the outside diameter takes place the melt strand and already partially cured Tube.

In einem sich in Produktionsrichtung gesehen daran anschließenden Vakuum-Kalibrierbad 4 erfolgt dann das Auskühlen und Aushärten des Kunststoffrohres durch Sprühwasser, wobei in der Zeichnung ein Wasserzulauf 6 und ein Wasserabfluß 7 erkennbar ist. Weiterhin schließt an das Vakuum-Kalibrierbad 4 ein Vakuumanschluß 8 an und das sich in dem Vakuum-Kalibrierbad 4 befindende Rohr 10 läuft über Stützrollen 11, die auch als Kalibrierrollen bezeichnet werden können und sich auf den gewünschten Rohrdurchmesser einstellen lassen. Die Oberfläche des Rohres 10 ist relativ hart und das Rohr 10 verläßt das Vakuum-Kalibrierbad 4 durch eine Vakuumabdichtung 9, die sich entweder selbständig auf den Rohrdurchmesser einstellt oder in Abhängigkeit der eingestellten Rohrdimensionen eingestellt wird. In der Vakuumabdichtung 9 können Formrollen angeordnet sein, die hydraulisch oder durch mechanische Federn betätigt werden, wobei gleichzeitig hier in den Durchlauf des Rohres Wasser zur Schmierung und Abdichtung eingeführt werden kann.In a subsequent production direction Vacuum Calibration 4 is then the cooling and curing the plastic pipe by spraying water, wherein in the drawing, a water inlet 6 and a water drain 7 is recognizable. Furthermore, close to the vacuum calibration 4 to a vacuum port 8 and located in the Vacuum calibration 4 located pipe 10 passes over support rollers 11, which can also be referred to as Kalibrierrollen and can be adjusted to the desired pipe diameter. The surface of the tube 10 is relatively hard and the tube 10th leaves the vacuum calibration 4 by a vacuum seal 9, either independently on the pipe diameter or depending on the set pipe dimensions is set. In the vacuum seal 9 can form rollers be arranged hydraulically or by mechanical springs be pressed while being here in the run of the pipe water for lubrication and sealing introduced can be.

In Fig. 1 ist weiterhin erkennbar, daß das eigentliche Vakuum-Kalibrierbad 4 zusammen mit der Kalibrierkammer 3 beispielsweise auf einem Gleis 12 über mit Rollen ausgerüsteten Ständern 14 verfahren werden kann, so daß eine Trennung der Extrusionslinie im Bereich zwischen der Kalibrierkammer 3 und der Vakuumkammer 2 erfolgen kann.In Fig. 1 is further seen that the actual vacuum calibration 4 together with the calibration chamber 3, for example on a track 12 over stands equipped with wheels 14 can be moved so that a separation of Extrusion line in the area between the calibration chamber 3 and the vacuum chamber 2 can be done.

Eine Hubanlage 15 ist ebenfalls verfahrbar über Rollstützen 16 vorgesehen und kann seitlich oder oberhalb der Extrusionslinie eingestellt werden. Diese Hubanlage 15 weist zum Beispiel einen Träger 17 auf, an den ein Anschlußstück 18 anschließt, das mit einem Greifarm 19 ausgerüstet ist, der zum Auswechseln der auswechselbaren Kalibrierhülsen vorgesehen wird. A lifting system 15 is also movable on roll supports 16th provided and may be laterally or above the extrusion line be set. This lifting system 15 has, for example Carrier 17, to which a connecting piece 18 connects, the equipped with a gripping arm 19, which is for replacement the replaceable Kalibrierhülsen is provided.

Der Pfeil F1 verdeutlicht in Fig. 1 die mögliche Hubbewegung des Trägers 17.The arrow F 1 illustrates in Fig. 1 the possible stroke movement of the carrier 17th

In Fig. 2 ist ein Ausführungsbeispiel für eine mögliche Greifeinrichtung dargestellt. Hierbei ist der Träger 17 erkennbar zusammen mit dem Anschlußstück 18 und dem Greifarm 19. Der Greifarm 19 trägt an seinem freien Ende Greiferstutzen 23 und 24, die um ein Gelenk 27 verstellbar sind.In Fig. 2 is an embodiment of a possible gripping device shown. Here, the carrier 17 is recognizable together with the fitting 18 and the gripping arm 19. Der Gripper arm 19 carries at its free end gripper neck 23 and 24, which are adjustable about a joint 27.

Eine Kalibrierhülse 20 weist ein Gelenk 21 auf, dem gegenüberliegend ein Schließmechanismus 22 vorgesehen ist, so daß diese Kalibrierhülse 20 aufgeklappt werden kann und damit über das Rohr gesetzt werden kann, um dann, nachdem es das Rohr umschließt, in die Kalibrierkammer 3 eingesetzt zu werden. Hierbei greifen die Greiferstutzen 23 und 24 in Aufnahmen 25 und 26 der Kalibrierhülse 20, öffnen die Kalibrierhülse 20 - Schwenkbewegung gemäß Pfeil F5 - um das Gelenk 21, d. h. schwenken die beiden Teile der Kalibrierhülse 20 um das Gelenk 21, nachdem der Schließmechanismus entsprechend geöffnet ist und nachdem die Kalibrierhülse um das Rohr gesetzt ist, schließen die Greifstutzen 23 und 24 die Kalibrierhülse 20 wieder und der Schließmechanismus 22 verriegelt die Kalibrierhülse 20 in ihrer Arbeitsstellung.A Kalibrierhülse 20 has a hinge 21, which is provided opposite a closing mechanism 22, so that this calibration sleeve 20 can be opened and thus can be placed over the pipe to then, after it encloses the pipe to be inserted into the calibration chamber 3 , In this case, the gripper sleeves 23 and 24 engage in receptacles 25 and 26 of the calibration sleeve 20, open the calibration sleeve 20 - pivoting movement according to arrow F 5 - to the joint 21, ie pivot the two parts of the calibration 20 about the joint 21 after the locking mechanism opens accordingly is and after the calibration sleeve is placed around the pipe, the gripping sleeves 23 and 24 close the calibration sleeve 20 again and the locking mechanism 22 locks the calibration sleeve 20 in its working position.

Hierbei kann die Kalibrierhülse wie im Stand der Technik beispielsweise aus de WO 96/36475 ausgebildet sein, d. h. es sind geringfügige Verstellungen der die Kalibrierhülse bildenden Einzelsegmente möglich, so daß eine glatte Rohrinnenfläche in der Kalibrierhülse geschaffen wird und der Innenradius dieser Rohrinnenfläche der Kalibrierhülse 20 kann an geringfügige Wanddicken einstellbar sein.Here, the calibration sleeve as in the prior art, for example from WO 96/36475, d. H. there are slight adjustments of the calibration sleeve forming individual segments possible, so that a smooth inner pipe surface in the Calibration sleeve is created and the inner radius of this Pipe inner surface of the calibration sleeve 20 may be minor Wall thicknesses can be adjustable.

In Fig. 2 verdeutlicht der Pfeil F1 die mögliche Hubbewegung des eigentlichen Trägers 17, der Pfeil F2 die Bewegung des Anschlußstückes 18 auf dem Träger 17, der Pfeil F3 die mögliche Schwenkbewegung des Greifarmes 19 um seine Längsachse, der Pfeil F4 die mögliche Schwenkbewegung des Anschlußstückes 18 um den Träger 17, so daß damit alle Positionen erreichbar sind, um die in der Kalibrierkammer 3 befindliche Kalibrierhülse 20 aus der Kalibrierkammer 3 zu entnehmen, diese Hülse in einem Vorratslager abzulegen, um dort eine neue Kalibrierhülse 20 zu ergreifen und diese wiederum über das Rohr 10 gesetzt in die Kalibrierkammer 3 einzuführen.In Fig. 2 illustrates the arrow F 1, the possible stroke movement of the actual carrier 17, the arrow F 2, the movement of the connecting piece 18 on the carrier 17, the arrow F 3, the possible pivotal movement of the gripping arm 19 about its longitudinal axis, the arrow F 4 the possible pivotal movement of the connecting piece 18 to the support 17 so that all positions are reachable to remove the located in the calibration 3 calibration sleeve 20 from the calibration chamber 3, store this sleeve in a storage warehouse, there to take a new calibration 20 and these in turn set via the tube 10 to introduce into the calibration chamber 3.

Die als Ausführungsbeispiel beschriebene Anlage kann natürlich auch eingesetzt werden, wenn eine Trennung des eigentlichen Rohres in dem Bereich zwischen der Vakuumkammer 2 und der Kalibrierkammer 3 erfolgen soll. Wenn das Rohr 10 durchtrennt wird, muß natürlich die Extrusionslinie stillgesetzt werden, während bei dem vorbeschriebenen Ausführungsbeispiel, bei welchem die Kalibrierhülse das Rohr 10 umgreifend eingesetzt wird, die Extrusionslinie im Schleichgang weitergefahren werden kann. Hier sind dann ggf. zusätzliche Kühleinrichtungen erforderlich, die das freiliegende Rohr im Bereich zwischen der Vakuumkammer 2 und der Kalibrierkammer 3 kühlen und damit ein zu weites Durchhängen des Rohres verhindern.The system described as an example of course can also be used when a separation of the actual Pipe in the area between the vacuum chamber 2 and the Calibration 3 should be done. When the tube 10 cuts Of course, the extrusion line must of course be shut down while in the above-described embodiment in which the calibration sleeve is inserted around the tube 10, the extrusion line will be continued at creep speed can. Additional cooling equipment may be required here, the exposed pipe in the area between the Vacuum chamber 2 and the calibration chamber 3 cool and thus prevent too much sagging of the pipe.

Claims (10)

Verfahren zur Herstellung von Kunststoffrohren mit einem Extruder, einem sich in Produktionsrichtung an den Extruder anschließenden Rohrkopf (1) und einer Kalibrierkammer (3), in der Kalibrierwerkzeuge an die Außenwand des Rohres angelegt werden, wobei während der Produktionsphase der Massespalt des Rohrkopfes (1) verstellbar ist und sich an den Ausgang des Rohrkopfes (1) eine auf die Außenseite des noch nicht ausgehärteten Rohres (10) wirkende Vakuum-Saugglocke (2) anschließt, durch die der Massestrangdurchmesser gesteuert verändert werden kann, während in der sich an die Vakuum-Saugglocke (2) anschließenden Kalibrierkammer unterschiedliche Rohrdurchmesser einstellbar sind und in einem sich an die Kalibrierkammer (3) anschließenden Vakuum-Kalibrierbad (4) das Rohr (10) abgekühlt und ausgehärtet wird, dadurch gekennzeichnet, daß in der Kalibrierkammer (3) unterschiedliche Kalibrierhülsen (20) einsetzbar sind, die während des Betriebes der Extrusionslinie im Schleichgang das Rohr umgreifend in die Kalibrierkammer (3) eingesetzt werden.Process for producing plastic pipes with an extruder, a pipe head (1) adjoining the extruder in the direction of production and a calibration chamber (3) in which calibration tools are applied to the outer wall of the pipe, the mass gap of the pipe head (1) being produced during the production phase is adjustable and at the output of the tube head (1) on the outside of the not yet cured tube (10) acting vacuum suction cup (2) adjoins, by the mass strand diameter can be changed controlled, while in which is connected to the vacuum Suction cup (2) subsequent calibration chamber different pipe diameters are adjustable and in a to the calibration chamber (3) subsequent vacuum calibration (4) the tube (10) is cooled and cured, characterized in that in the calibration chamber (3) different calibration sleeves ( 20) are used, which during operation of the extrusion line at creep speed the tube are encompassing used in the calibration chamber (3). Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 zur Herstellung von Kunststoffrohren mit einem Extruder, einem sich in Produktionsrichtung an den Extruder anschließenden Rohrkopf (1) und einer Kalibrierkammer (3), in der Kalibrierwerkzeuge an der Außenwandung des Rohres anliegen, wobei während der Produktionsphase der Massespalt des Rohrkopfes (1) verstellbar ist und sich an den Ausgang des Rohrkopfes eine auf die Außenseite des noch nicht ausgehärteten Rohres (10) wirkende Vakuum-Saugglocke (2) anschließt, durch die der Massestrangdurchmesser gesteuert verändert werden kann, während in der sich an die Vakuum-Saugglocke (2) anschließenden Kalibrierkammer (3) unterschiedliche Rohrdurchmesser erzielbar sind, dadurch gekennzeichnet, daß für die Zugänglichkeit der Kalibrierkammer (3) zum Einsetzen unterschiedliche Kalibrierhülsen (20) die Kalibrierkammer (3) und ein sich anschließendes Vakuum-Kalibrierbad (4) verfahrbar gelagert sind.Apparatus for carrying out the method according to claim 1 for producing plastic pipes with an extruder, a pipe head (1) adjoining the extruder in the production direction and a calibration chamber (3) in which calibration tools abut against the outer wall of the pipe, wherein during the production phase of the Mass gap of the pipe head (1) is adjustable and at the output of the pipe head on the outside of the uncured pipe (10) acting vacuum suction cup (2) followed by the mass strand diameter can be changed controlled, while in the on the vacuum suction cup (2) subsequent calibration chamber (3) different pipe diameters can be achieved, characterized in that for the accessibility of the calibration chamber (3) for insertion different calibration sleeves (20) the calibration chamber (3) and a subsequent vacuum calibration (4 ) are movably mounted. Vorrichtung nach Anspruch 2, gekennzeichnet durch einen Greiferarm (19) mit in ihrem Abstand einstellbaren Greifstutzen (23, 24), die in Aufnahmen (25, 26) einer Kalibrierhülse (20) einsetzbar sind, wobei die Kalibrierhülse (20) um ein Gelenk (21) aufgeklappt werden kann.Apparatus according to claim 2, characterized by a gripper arm (19) with adjustable gripping nozzles (23, 24) which can be inserted in receptacles (25, 26) of a calibrating sleeve (20), wherein the calibrating sleeve (20) is mounted around a joint ( 21) can be opened. Vorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die klappbaren Teile der Kalibrierhülse (20) in ihrer Arbeitslage mit einem Schließmechanismus (22) verriegelbar sind.Apparatus according to claim 2 or 3, characterized in that the foldable parts of the calibration sleeve (20) in its working position with a locking mechanism (22) are lockable. Vorrichtung nach einem oder mehreren der vorhergehendend Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Greifarm (19) von einer Hubanlage (15) mittels eines Anschlußstückes (18) getragen wird.Device according to one or more of the preceding claims 2 to 4, characterized in that the gripping arm (19) is carried by a lifting device (15) by means of a connecting piece (18). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Anschlußstück (18) auf der Hubanlage in Längsachse parallel zur Produktionslinie verfahrbar ist.Apparatus according to claim 5, characterized in that the connecting piece (18) on the lifting system in the longitudinal axis parallel to the production line is movable. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche 2 bis 6, dadurch gekennzeichnet, daß die Hubanlage quer zur Längsachse der Extrusionslinie verfahrbar ist.Device according to one or more of the preceding claims 2 to 6, characterized in that the lifting system is movable transversely to the longitudinal axis of the extrusion line. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche 2 bis 7, dadurch gekennzeichnet, daß das Anschlußstück (18) um die Achse des Trägers (17) der Hubanlage (15) verschwenkbar ist (F4). Device according to one or more of the preceding claims 2 to 7, characterized in that the connecting piece (18) about the axis of the carrier (17) of the lifting system (15) is pivotable (F4). Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche 2 bis 8, dadurch gekennzeichnet, daß der Greifarm (19) um seine Längsachse schwenkbar ist (F3).Device according to one or more of the preceding claims 2 to 8, characterized in that the gripping arm (19) is pivotable about its longitudinal axis (F3). Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche 2 bis 9, dadurch gekennzeichnet, daß für jede Rohrdimension eine auszuwechselnde Kalibrierhülse (20) vorgesehen ist, mit der aber die Wandstärke des Rohres noch regulierbar ist.Device according to one or more of the preceding claims 2 to 9, characterized in that a calibration sleeve (20) to be exchanged is provided for each pipe dimension, but with which the wall thickness of the pipe can still be regulated.
EP04013077A 2003-08-19 2004-06-03 Apparatus for producing plastic pipes Expired - Lifetime EP1508425B1 (en)

Applications Claiming Priority (2)

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DE10337964A DE10337964B4 (en) 2003-08-19 2003-08-19 Method and device for producing plastic pipes
DE10337964 2003-08-19

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EP (1) EP1508425B1 (en)
CN (1) CN100457427C (en)
DE (1) DE10337964B4 (en)
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WO (1) WO2005018910A2 (en)

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DE102005028084A1 (en) * 2005-06-17 2006-12-28 Cincinnati Extrusion Gmbh Calibrating units exchanging method for use in vacuum bath of pipe extrusion line, involves preassembling one calibrating unit, exchanging another calibrating unit against former unit and connecting extruding profiles with melt strand
CN102363357A (en) * 2011-11-04 2012-02-29 张子金 Rotary sizing apparatus for steel wire reinforced plastic tube
CN118418420A (en) * 2024-07-03 2024-08-02 乐山嘉诚建材有限公司 Offset correction device for PVC pipe machining

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DE102011004305A1 (en) 2011-02-17 2012-08-23 Evonik Degussa Gmbh Process for the production of bars
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JP5088441B1 (en) * 2011-12-22 2012-12-05 富士ゼロックス株式会社 Tubular body manufacturing apparatus and tubular body manufacturing method
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DE102005028084A1 (en) * 2005-06-17 2006-12-28 Cincinnati Extrusion Gmbh Calibrating units exchanging method for use in vacuum bath of pipe extrusion line, involves preassembling one calibrating unit, exchanging another calibrating unit against former unit and connecting extruding profiles with melt strand
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CN102363357A (en) * 2011-11-04 2012-02-29 张子金 Rotary sizing apparatus for steel wire reinforced plastic tube
CN102363357B (en) * 2011-11-04 2014-03-19 张子金 Rotary sizing apparatus for steel wire reinforced plastic tube
CN118418420A (en) * 2024-07-03 2024-08-02 乐山嘉诚建材有限公司 Offset correction device for PVC pipe machining

Also Published As

Publication number Publication date
EP1508425B1 (en) 2013-03-27
EP1508425A3 (en) 2005-04-06
DE10337964A1 (en) 2005-03-17
CN100457427C (en) 2009-02-04
WO2005018910A2 (en) 2005-03-03
US20060186584A1 (en) 2006-08-24
WO2005018910A3 (en) 2005-05-06
CN1832843A (en) 2006-09-13
DE10337964B4 (en) 2007-04-26
RU2006108526A (en) 2006-08-10

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